APCSP
What symbol do you use to do multiplication in JavaScript?
*
In the following code, we create a circle and add it to the screen. What is the meaning of the x variable? var x = 20; var circle = new Circle(x); add(circle);
The radius of the circle
What is a callback function?
A function passed to an event handler that is called every time a certain event happens
What symbol do you use to do division in JavaScript?
/
println(2 + 2);
4
To ask the user of the program for a number, which function should you use?
Both readInt and readFloat are for numbers.
We've written a function animate that moves a ball across the screen like this: function start(){ //add code here } function animate(e){ ball.move(5, 5); } How can we set up animate to be called every time a key on the keyboard is pressed down?
function start(){ keyDownMethod(animate); }
What function do you need to call to get the width of the screen?
getWidth()
What are the coordinates of the top right corner of the screen?
getWidth(), 0
Suppose we've written a function drawCircle that we want to call every time the mouse is clicked. How can we do this?
mouseClickMethod(drawCircle);
to print a line
println();
What function do you need to call to ask the user of the program to enter text?
readLine
Varaible
var